an average katana with a simple rectangular handguard with a circle around the blade and two inward curved lines stretching to each corner the long way and greyish-blue hilt.
- Shikai: It is activated by the command. Shine Brightly (光華閃け, kōka hirameke).
Shikai Special Ability: When Nijigasumi is drenched with spiritual energy, it is able to create limitless amounts of light. When Nijigasumi shines, it melds with all other light. When released, wielder can use that light to take control of shadows and attack opponents with them. Nijigasumi's ability also allows it to manipulate light for other various effects, such as:
Invisibility: Ability to make wielder invisible to the naked eye, by surrounding them with light.
Blinding Light: Ability to create a large area of light around opponents, disrupting their visual perceptions, causing confusion, and decreasing their chance to fight back against attack.
Illusions: The light released from Nijigasumi reigns over the dimensions that surround the opponent and alters them, thus creating this alternate dimension of light. This ability is to use this light to alter another's perceptions, allowing wielder to make the opponent see what he wants him to see.
Blade of Light: Dissolves the actual blade and replaces it with a blade made of pure light. If the blade is broken, it can completely cover it to allow the battle to continue. Wielder can also create blades of light separate from the Zanpakuto, using them as projectiles to fire at enemies.
Saigyoku Nijigasumi (彩玉虹霞, Swallowing Orb of Rainbow Mist): Causes a multitude of twinkling lights to appear, which then form together around an opponent, creating a huge sphere which engulfs everything within a significant radius. Anyone within that radius will potentially get caught in it. Immediately following that, the sphere collapses in on itself, using the compressed light to crush everything within it. Only a strong enough spiritual pressure can push back and destroy this power.